I used to hate PE too, but then my foot muscles screwed up, and I ended up not being able to do any sports for years. I still can't do any running without screaming from the pain. And until recently, I didn't do any exercise because I stopped doing PE and I stopped doing any extracurricular sports in high school. That led to me getting very unfit and quite fat. It wasn't at all pleasant.
After that experience, I now think there should be more sessions of PE in schools, because being unfit is horrible and kids should be educated on how to avoid that fate, while still maybe having a bit of fun. (and who doesn't enjoy rounders? It was the one thing I liked in PE. o.O)
I also think the Daily Mile scheme is a great idea, because a mile isn't even that far, but it really helps kids stay fit. (keep in mind that running a mile only takes about 15 minutes at most)